What is ICD-10 code E74.89?

E74.89 is the ICD-10-CM diagnosis code for Other specified disorders of carbohydrate metabolism. A metabolic disorder affecting how the body breaks down or processes carbohydrates (sugars and starches) that doesn't fit into other specific carbohydrate metabolism categories. E74.89 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. E74.89 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. E74.89 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. E74.89 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

Which HCC does E74.89 map to under V28?

E74.89 has no payable CMS-HCC V28 mapping in the final FY2026 CMS file.

What RAF reference is published for E74.89?

E74.89 has no V28 reference coefficient because the final FY2026 source verifies no payable V28 mapping.

What is the V28 vs V24 difference for E74.89?

E74.89 has verified no payable V28 mapping in the final FY2026 source. Select a historical effective period before making any V24 comparison.

What documentation supports E74.89?

Document the specific carbohydrate metabolism defect in the medical record for clarity Review the medical record to ensure a more specific E74 code is not applicable before using this code E74.89 is not a CMS-HCC V28 payment code in the verified current source, so MEAT is not the payment hook. Documentation still has to support the diagnosis if you report it.

2026 ICD-10-CM E74.89: Other specified disorders

E74.89 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · free HCC coding tools

ICD-10-CM Code View

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Code lookupE74.89

Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Endocrine, nutritional and metabolic diseases (E00-E89) / Metabolic disorders (E70-E88)

E74.89

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Other specified disorders of carbohydrate metabolism

A metabolic disorder affecting how the body breaks down or processes carbohydrates (sugars and starches) that doesn't fit into other specific carbohydrate metabolism categories.

Buddy Insight

Overview Risk Models Code Book Documentation Audit Notes Edition comparison

CMS-HCC V28

N/A

—

Not risk-adjusted for this model/period.

Not mapped

CMS-HCC V24

Historical

Not used for standard CY2026 Medicare Advantage payment. Select a historical period to review V24.

Not used for CY2026 payment

ACA/HHS

N/A

—

Not risk-adjusted for this model/period.

Not mapped

ESRD/PACE

N/A

—

Not risk-adjusted for this model/period.

Not mapped

RXHCC

Mapped

HCC 43

Pituitary, Adrenal Gland, and...

Code-level coefficient reference

Code Book Path

Official

E74Other disorders of carbohydrate metabolism E74.8Other specified disorders of carbohydrate metabolism E74.89Other specified disorders of carbohydrate metabolism

Inclusion Terms

Official

Essential pentosuria

Excludes 2

Official

Ehlers-Danlos syndromes (Q79.6-)Inherited from E70-E88

Related Codes

Official

E74.81Disorders of glucose transport, not elsewhere classified E74.82Disorders of citrate metabolism

Includes

Official

No Includes notes are included in this display for E74.89. Check the code and parent instructions in the Code Book.

Excludes 1

Official

transitory endocrine and metabolic disorders specific to newborn (P70-P74)Inherited from E00-E89, E70-E88, E74
androgen insensitivity syndrome (E34.5-)Inherited from E00-E89, E70-E88, E74
congenital adrenal hyperplasia (E25.0)Inherited from E00-E89, E70-E88, E74
hemolytic anemias attributable to enzyme disorders (D55.-)Inherited from E00-E89, E70-E88, E74
Marfan syndrome (Q87.4-)Inherited from E00-E89, E70-E88, E74
5-alpha-reductase deficiency (E29.1)Inherited from E00-E89, E70-E88, E74
diabetes mellitus (E08-E13)Inherited from E00-E89, E70-E88, E74
hypoglycemia NOS (E16.2)Inherited from E00-E89, E70-E88, E74
increased secretion of glucagon (E16.3)Inherited from E00-E89, E70-E88, E74
mucopolysaccharidosis (E76.0-E76.3)Inherited from E00-E89, E70-E88, E74

Code First

Official

No Code First sequencing instructions are included in this display for E74.89. Check the code and parent instructions in the Code Book.

Use Additional

Official

No Use Additional Code instructions are included in this display for E74.89. Check the code and parent instructions in the Code Book.

Code Also

Official

No Code Also instructions are included in this display for E74.89. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance

Specific carbohydrate metabolism disorder identified by the provider

Laboratory confirmation including relevant enzyme assays or metabolic testing

Genetic testing results if available

Documentation of clinical manifestations and dietary triggers

MEAT Support

HCC Buddy guidance

Specific carbohydrate metabolism disorder identified by the provider

Laboratory confirmation including relevant enzyme assays or metabolic testing

Genetic testing results if available

Documentation of clinical manifestations and dietary triggers

Audit Caution

HCC Buddy guidance

Using this code for conditions that have their own specific codes (GSD, galactosemia, etc.)

Defaulting to E74.9 (unspecified) when the specific carbohydrate disorder is documented but just lacks a unique code

Confusing hereditary fructose intolerance (metabolic emergency) with dietary fructose intolerance (benign)

Not coding complications such as hypoglycemia, liver damage, or failure to thrive separately

Common Mistakes

HCC Buddy guidance

E74.9 — Disorder of carbohydrate metabolism, unspecified: use only when no specific disorder is identified

E74.00-E74.09 — Glycogen storage diseases: separate specific codes for GSD

E74.20-E74.29 — Disorders of galactose metabolism: galactose-specific disorders have their own codes

E74.31 — Sucrase-isomaltase deficiency: has its own specific code

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is E74.89 an HCC code?

E74.89 is not in the CMS-HCC V28 or V24 community payment model. E74.89 has a separate mapping under the CMS-HCC ESRD model (HCC 23 (Other Significant Endocrine and Metabolic Disorders)) and the Part D RxHCC model (HCC 43 (Pituitary, Adrenal Gland, and Other Endocrine and Metabolic Disorders)); the applicable result needs member context. E74.89 also appears in the HHS-HCC commercial risk model (HCC 028 (HHS-HCC 028 child, RAF varies by metal level)), where the result depends on member context and is not a Medicare Advantage payment mapping.

Code: E74.89
Description: Other specified disorders of carbohydrate metabolism
HCC (V28): No CMS-HCC V28 mapping
RAF reference coefficient: —
Billable: Yes
Payment year: 2026

HCC Category Mapping

RxHCCHCC 43, Pituitary, Adrenal Gland, and Other Endocrine and Metabolic Disorders

Not separately weighted

These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. Weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.

Work E74.89 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for E74.89

For E74.89, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
EEvaluate: test results, medication response, or physical findings reviewed by the provider
AAssess: explicit mention in the assessment or plan with acknowledgment of status
TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis

Coder workflow notes

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What This Code Means

E74.89 is the ICD-10-CM diagnosis code for other specified disorders of carbohydrate metabolism. A metabolic disorder affecting how the body breaks down or processes carbohydrates (sugars and starches) that doesn't fit into other specific carbohydrate metabolism categories. E74.89 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering metabolic disorders (e70-e88).

E74.89 has no mapping under the CMS-HCC V28 or V24 community payment models. E74.89 has a separate mapping under the CMS-HCC ESRD model (HCC 23 (Other Significant Endocrine and Metabolic Disorders)) and the Part D RxHCC model (HCC 43 (Pituitary, Adrenal Gland, and Other Endocrine and Metabolic Disorders)); the applicable result needs member context. E74.89 also appears in the HHS-HCC commercial risk model (HCC 028 (HHS-HCC 028 child, RAF varies by metal level)), where the result depends on member context and is not a Medicare Advantage payment mapping. Do not assign V28 risk adjustment value from this page; verify the applicable model and payment year before using this code for risk adjustment.

Document the specific carbohydrate metabolism defect in the medical record for clarity.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for E74.89 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Document the specific carbohydrate metabolism defect in the medical record for clarity
•Review the medical record to ensure a more specific E74 code is not applicable before using this code

Clinical Significance

Other specified disorders of carbohydrate metabolism is a residual code capturing carbohydrate metabolism disorders that do not fit into specific categories for glycogen storage diseases, galactose disorders, or glucose transport defects. This includes conditions like essential fructosuria, hereditary fructose intolerance, and fructose-1,6-diphosphatase deficiency. Some of these can cause severe hypoglycemia and liver damage.

Documentation Requirements

✓Specific carbohydrate metabolism disorder identified by the provider
✓Laboratory confirmation including relevant enzyme assays or metabolic testing
✓Genetic testing results if available
✓Documentation of clinical manifestations and dietary triggers
✓Current dietary management plan including avoidance of specific carbohydrates

Commonly Confused Codes

•E74.9: Disorder of carbohydrate metabolism, unspecified: use only when no specific disorder is identified
•E74.00-E74.09: Glycogen storage diseases: separate specific codes for GSD
•E74.20-E74.29: Disorders of galactose metabolism: galactose-specific disorders have their own codes
•E74.31: Sucrase-isomaltase deficiency: has its own specific code
•E74.4: Disorders of pyruvate metabolism and gluconeogenesis: separate category

Child Codes

E74.81Disorders of glucose transport, not elsewhere classified

E74.82Disorders of citrate metabolism

E74.89Other specified disorders of carbohydrate metabolism

Code Hierarchy

└E74Other disorders of carbohydrate metabolism └E74.8Other specified disorders of carbohydrate metabolism └E74.89Other specified disorders of carbohydrate metabolism

└E74.89Other specified disorders of carbohydrate metabolism

HCC Buddy Code Card

E74.89

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HCC Category Mapping

MEAT review for E74.89

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What This Code Means

Coding Tips

Clinical Significance

Documentation Requirements

Commonly Confused Codes

Child Codes

Code Hierarchy

E74.89 code history

Work E74.89 in HCC Buddy

E74.89 ICD-10-CM Code: Other specified disorders of carbohydrate metabolism

HCC Buddy Code Card

E74.89

Is E74.89 an HCC code?

HCC Category Mapping

MEAT review for E74.89

Get the V28 mapping + MEAT cheat sheet

What This Code Means

Coding Tips

Clinical Significance

Documentation Requirements

Commonly Confused Codes

Child Codes

Code Hierarchy

E74.89 code history

Work E74.89 in HCC Buddy